Do I have this conversation.....again?

So my wife and I have been married 29 years. We are in our early 50s. Kids are all grown and out. We have settled into a once a week sex life which occurs on Saturday nights. We generally have a date night on Saturdays, out for a nice dinner then on to one of our favorite local spots for an after dinner drink, listen to some music then home to conclude our Saturday evening in the usual fashion. I've been reading a lot on this site about HD/LD couples and have come to the conclusion that I'd like to increase our frequency to at least twice a week. That was probably our average over the early years of our marriage and I can be fine with that. I think that over the past years I have been rejected enough for anything that might occur during the week I sort of gave up trying and figured our Saturday night sex was a "sure thing" so leave it at that and just wait for the week to go by and take what I can get. My wife seems to enjoy our lovemaking as she almost always has what seems to be a pleasurable orgasm but my take on things is a little different. My feeling is that she pays very little attention to my wants and needs during sex. She pretty much lays on her back the whole time, reaches her climax and then it's my turn to finish and for her it's OK, let's get some sleep. She won't perform oral on me although she enjoys me performing it on her. I'd really like her be more observant of what I'd like to do or at least make my experience more enjoyable. So I've had this conversation with her twice within the last couple of months. I discussed that I'd like to have sex more than once a week, I've asked her if she could initiate once in a while and if there is anything I can do to make things better for her. She says in her mind all is well and nods when I ask about increasing our frequency but I still get rejected if I attempt anything during the week. I've also talked to her about a lack of affection. I'm the one who initiates any hugs, kisses or even holding hands. She's said she'd do better at that too but again nothing has changed. She basically has physical contact with me one night a week. I've tried to make sure I take care of myself as I'm in the gym three times per week and dropped about 25 pounds about 5 years ago and have kept it off. So I think I'm doing pretty well as far keeping my appearance up, although no amount of time in the gym will regrow my receding hairline. Overall we have a good relationship. We enjoy doing things together and like each others company but this piece of our life is really starting to get to me. So I really don't know if I want to have this conversation for a third time but I don't know what else to do to try to get my points across and get her to change. Any thoughts would be appreciated.

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